The effect of physisorbed hydrogen on the desorption of metastable particles induced by electronic excitation from the surface of rare-gas. Solids (Ar, Kr, and Xe) was investigated systematically. When the surface of a rare-gas solid was exposed to a very small quantity of hydrogen at a temperature of about 30 K, in all cases, the desorption of hydrogen metastables was observed, and new desorption species of Kr* via cavity ejection process appeared in time-of-flight spectra for Kr. For Ar, although no significant increase of desorption yield was found, the kinetic energy of Ar* desorbed through cavity ejection process was increased by hydrogen adsorption. These results will be discussed in terms of the change of electron affinity of the matrix and the interaction between hydrogen and rare-gas molecules in excited states.